Predicting the hydrodynamic forces on geobag revetments

A. Akter, Gareth Pender, Grant Wright, Martin Crapper

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Sand-filled geotextile bags (geobags) are commonly used for riverbank protection, however, despite their deployment in a significant number of locations, the failure modes of such structures are not well understood. This paper describes a series of 1:10 physical model tests designed to improve our understanding of the basic failure modes of geobag revetments used as river bank protection. In particular, the aim of the experimental programme is to quantify the relationship between hydraulic shear stress on the revetment surface and geobag displacement. The aspect of the work reported is the use of two analytical techniques, the Conveyance Estimation System (CES) and the membrane analogy method developed by Chow to predict hydraulic shear stress on the geobag surface. It is concluded that both methods produce acceptable shear stress predictions for the initially washed away bags, although the CES is recommended for future use because of its better prediction and ease of application.
    Original languageEnglish
    Pages (from-to)328-338
    JournalJournal of Flood Risk Management
    Volume4
    Issue number4
    Early online date7 Aug 2011
    DOIs
    Publication statusPublished - Dec 2011

    Keywords

    • Conveyance Estimation System
    • failure modes
    • geobag
    • hydrodynamic forces
    • shear stress

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